Summary:

Existing 30-m land cover Thematic Mapper classification by CCRS was aggregated and reprocessed and are now available at multiple resolutions (10x5 minutes and 30 minutes). These data were regridded for use by the BOREAS Follow-on Carbon and Hydro-Meteorological modeling groups.  Characteristics of the individual products are described below.

Maps included in this data set:

Regridded TM Mosaic Land Cover Maps, 10 by 5 minutes
Regridded TM Mosaic Land Cover Maps, 30 min
 

Data Citation:

Cite this data set as follows (citation revised on October 30, 2002):

Hall, F., G. Rapalee, and D. Knapp. 2001. BOREAS Follow-On DSP-10 Regridded TM Mosaic Land Cover Maps for 1994. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

Contacts:

Forrest G. Hall
University of Maryland
NASA GSFC
Greenbelt MD
(301) 614-6659
(301) 614-6695
Forrest.G.Hall@gsfc.nasa.gov

Gloria Rapalee
University of California, Irvine
NASA GSFC
Greenbelt MD
(301) 286-0544
(301) 286-0239
grapalee@pop900.gsfc.nasa.gov

David Knapp
Raytheon ITSS
NASA/GSFC
Greenbelt, MD
Phone: (301) 286-1424
David.Knapp@gsfc.nasa.gov
 

Processing:

If there are any questions about how this aggregation was done, please contact Gloria Rapalee (Gloria.Rapalee@gsfc.nasa.gov) or Jaime
Nickeson (Jaime.Nickeson@gsfc.nasa.gov).

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Regridded TM Mosaic Land Cover Maps, 10 by 5 minutes

These images were produced by aggregating the 30-m land cover Thematic Mapper classification by CCRS to a 10' (horizontal) by 5' (vertical) pixel size in a straight latitude/longitude grid. See the document dsp01_tm_landcover_doc.html for more information on the original data product that this is based on.

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Image Specifications

Each image is 66 pixels by 60 lines and contains no leading header bytes. Each pixel in the image is represented by one byte. The DN value for each pixel is the percentage of the coverage that pixel that is of a given class. The sum of all of the percentages in the various images might not be 100 for a given pixel because of rounding.
 

Land Cover Maps, 10 by 5 minutes

class001_10by5min.img class007_10by5min.img class011_10by5min.img class013_10by5min.img class021_10by5min.img class022_10by5min.img class025_10by5min.img class032_10by5min.img class035_10by5min.img class036_10by5min.img class039_10by5min.img class043_10by5min.img class053_10by5min.img class055_10by5min.img class059_10by5min.img class064_10by5min.img class069_10by5min.img class079_10by5min.img class080_10by5min.img class081_10by5min.img class085_10by5min.img class099_10by5min.img class113_10by5min.img class134_10by5min.img class150_10by5min.img class160_10by5min.img class161_10by5min.img class162_10by5min.img

An additional image is included for which the DN value for each pixel is the percentage of the coverage of the CCRS mosaic in that pixel:

class00_10by5min.img

The class numbers correspond to the class numbers used by CCRS in their classification.
 

CCRS Land Cover Classification
Class ID	Class Name
Class 0	Percent of data coverage area of image
Class 1	Water
Class 7	Coniferous high crown density black spruce
Class 11	Coniferous high crown density black spruce and Jack pine
Class 13	Burn recent bare area
Class 21	Coniferous high crown density black spruce younger
Class 22	Coniferous medium crown density jack pine
Class 25	Coniferous medium crown density black spruce
Class 32	Coniferous medium crown density black spruce, jack pine
Class 35	Burn recent sparse vegetation cover
Class 36	Mixed coniferous medium density
Class 39	Mixed coniferous high density
Class 43	Coniferous low crown density black spruce, jack pine
Class 53	Mixed forest
Class 55	Coniferous very low density
Class 59	Coniferous low crown density jack pine
Class 64	Old burns mixed regeneration cover
Class 69	Mixed deciduous forest
Class 79	Deciduous high crown density
Class 80	Deciduous medium crown density
Class 81	Older burns shrub-grass cover
Class 85	Shrubs and grassland
Class 99	Deciduous low broadleaf cover
Class 112	Bare disturbed areas sparse vegetation cover
Class 113	Burn rock outcrops
Class 134	Bare disturbed area
Class 150	Clouds
Class 160	Cropland high biomass
Class 161	Cropland medium biomass
Class 162	Cropland low biomass

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The Pixel-Area Image

The file "0_pixel_area_10by5min.img" is an image that provides the area for each of the 10 by 5 minute cells. The area for each pixel is given in hectares. One hectare equals 10,000 square meters.
      Each pixel value is represented as a 2-byte integer. This image has the low-order byte first. On some systems, the bytes may need to be swapped in order the read the 2-byte integers correctly. On UNIX systems, this can be done with the following command.

dd if=input_file_name conv=swab of=output_file_name

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Spatial Coverage

These data cover the same area as the regional meteorological parameters assembled by Val Pauwels. The data are in a straight latitude/longitude grid. The BOREAS grid coordinates listed below are simply given for reference purposes. The corner coordinates are identical to the upper left corner of Val's regional data set.

Corner          X         Y        Longitude         Latitude
---------------------------------------------------------------------
Upper Left    242.697   675.191  107°00'00.00" W   57°00'00.00" N
Upper Right   903.583   765.939   96°00'00.00" W   57°00'00.00" N
Lower Left    274.686   119.043  107°00'00.00" W   52°00'00.00" N
Lower Right  1022.683   221.752   96°00'00.00" W   52°00'00.00" N

The X and Y coordinates listed above are the BOREAS grid coordinates which are based on an Albers Equal Area Conic (AEAC) projection with the following parameters:

Origin: 111.00 deg W, 51.00 deg N
Standard Parallels: 52.5 deg N, 58.5 deg N
Units of Measure: kilometers

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Regridded TM Mosaic Land Cover Maps, 30 min

These images were produced by aggregating the 30-m land cover Thematic Mapper classification by CCRS to a 0.5 degree by 0.5 degree (or 30' by 30') pixel size in a straight latitude/longitude grid. See the document dsp01_tm_landcover_doc.html for more information on the original data product that this is based on.

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Image Specifications

Each image is 22 pixels by 10 lines and contains no leading header bytes. Each pixel in the image is represented by one byte. The DN value for each pixel is the percentage of the coverage that pixel that is of a given class. The sum of all of the percentages in the various images might not be 100 for a given pixel because of rounding.
 

Land Cover Maps, 30 minutes

class001_30min.img class007_30min.img class011_30min.img class013_30min.img class021_30min.img class022_30min.img class025_30min.img class032_30min.img class035_30min.img class036_30min.img class039_30min.img class043_30min.img class053_30min.img class055_30min.img class059_30min.img class064_30min.img class069_30min.img class079_30min.img class080_30min.img class081_30min.img class085_30min.img class099_30min.img class113_30min.img class134_30min.img class150_30min.img class160_30min.img class161_30min.img class162_30min.img

An additional image is included for which the DN value for each pixel is the percentage of the coverage of the CCRS mosaic in that pixel:

class00_30min.img

The class numbers correspond to the class numbers used by CCRS in their classification.
 

CCRS Land Cover Classification
Class ID	Class Name
Class 0	Percent of data coverage area of image
Class 1	Water
Class 7	Coniferous high crown density black spruce
Class 11	Coniferous high crown density black spruce and Jack pine
Class 13	Burn recent bare area
Class 21	Coniferous high crown density black spruce younger
Class 22	Coniferous medium crown density jack pine
Class 25	Coniferous medium crown density black spruce
Class 32	Coniferous medium crown density black spruce, jack pine
Class 35	Burn recent sparse vegetation cover
Class 36	Mixed coniferous medium density
Class 39	Mixed coniferous high density
Class 43	Coniferous low crown density black spruce, jack pine
Class 53	Mixed forest
Class 55	Coniferous very low density
Class 59	Coniferous low crown density jack pine
Class 64	Old burns mixed regeneration cover
Class 69	Mixed deciduous forest
Class 79	Deciduous high crown density
Class 80	Deciduous medium crown density
Class 81	Older burns shrub-grass cover
Class 85	Shrubs and grassland
Class 99	Deciduous low broadleaf cover
Class 112	Bare disturbed areas sparse vegetation cover
Class 113	Burn rock outcrops
Class 134	Bare disturbed area
Class 150	Clouds
Class 160	Cropland high biomass
Class 161	Cropland medium biomass
Class 162	Cropland low biomass

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Spatial Coverage

These data cover the same area as the regional meteorological parameters assembled by Val Pauwels. The data are in a straight latitude/longitude grid. The BOREAS grid coordinates listed below are simply given for reference purposes. The corner coordinates are identical to the upper left corner of
Val's regional data set.

Corner         X         Y      Longitude         Latitude
----------------------------------------------------------------
Upper Left   242.697  675.191  107°00'00.00" W  57°00'00.00" N
Upper Right  903.583  765.939   96°00'00.00" W  56°00'00.00" N
Lower Left   274.686  119.043  107°00'00.00" W  52°00'00.00" N
Lower Right 1022.683  221.752   96°00'00.00" W  52°00'00.00" N

The X and Y coordinates are the BOREAS grid coordinates which are based on an Albers Equal Area Conic (AEAC) projection with the following parameters:

Origin: 111.00 deg W, 51.00 deg N
Standard Parallels: 52.5 deg N, 58.5 deg N
Units of Measure: kilometers

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References:

Steyaert, L.T., F.G. Hall, and T.R. Loveland. 1997. Land Cover Mapping, Fire Disturbance-Regeneration, and Multiresolution Land Cover Scaling Studies in the BOREAS Forest Ecosystem with Multiresolution 1-km AVHRR. J. Geophys. Res.102: 29581-29598.

Citation:

Cite this data set as follows (citation revised on October 30, 2002):

Hall, F., G. Rapalee, and D. Knapp. 2001. BOREAS Follow-On DSP-10 Regridded TM Mosaic Land Cover Maps for 1994. Data set. Available on-line [http://www.daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A.

Document ID:

dsp10_tm_mosaic

Document Revision Date:

27-Sept-2001 (citation revised on 30-Oct-2002)

Document Review Date:

27-Sept-2001

Document Curator:

webmaster@daac.ornl.gov

Document URL:

http://daac.ornl.gov/BOREAS/FollowOn/guides/dsp10_landcov_tm_mos_maps.html

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